Designed for robust electrical systems, the Siemens JXD23B250 is a 3-pole, 250A molded case circuit breaker. This JD-frame breaker mounts into Siemens Sentron, P4, and P5 panelboards, as well as SB switchboards. It replaces older JD63B250 and JXD63B250 breakers. Featuring a 65kAIC rating at 240VAC, it includes a non-interchangeable trip unit with adjustable instantaneous settings. Lugs (TA2J6500) are not included.
Which Siemens panelboards and switchboards are compatible with the JXD23B250?
This breaker is designed for use in Siemens Sentron Panelboards, P4 and P5 Panelboards, SB Switchboards, and Motor Control Centers.
Can I use aluminum wiring with the JXD23B250?
Yes, the standard lugs on this breaker are dual-rated for both copper and aluminum conductors ranging from 3/0 AWG to 500 kcmil.
How does the adjustable trip unit function on this breaker?
It features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. This allows you to tune the instantaneous trip point based on your specific load requirements.
Can the Siemens JXD23B250 replace older I-T-E versions of the same breaker?
Yes. Siemens acquired I-T-E and continued manufacturing the Sentron JD frame series. A modern Siemens JXD23B250 is a direct replacement for an older I-T-E breaker with the exact same catalog number.
Is the JXD23B250 rated for direct current applications?
Yes, in addition to its alternating current ratings, this breaker is rated for 250VDC applications with an interrupting capacity of 30kA.
How does the JXD23B250 mount into a panelboard?
This is a bolt-on circuit breaker. It requires bolted connections to the panelboard bus bars rather than snapping or plugging into place, ensuring a secure connection for high-amperage applications.
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